Patch vulcanizing apparatus



F. E. KITE PATCH VULCANIZING APPARATUS May 16, 1939.

Filed June 15, 1937 2 Sheets-Sheet l I'll ATTO

Ma '16,1939. F'.E. K|TE 2,158,703

' PATCH VULCANIZING APPARATUS Filed June 15, .1937 2 Sheets-Sheet 2INVNTOR. F/oya 5 He.

BX ATTORNY.

Patented May 16, 1939 MTED STATES PATENT emer- 2,158,703 PATCH voncsmzmoAPPARATUS Floyd E. KiteQLos'Angeles, Calif. Application June 15,1937,Serial No. 148,295

' 6 Claims. .(Cl. 18-18 This invention relates to patch vulcanizingapparatus. r

The general object of the invention is to provide a novel apparatus bymeans of which a patch may be secured in place and vulcanized to thecasing or an automobile tire.

Another object of the inventionis to provide a patch vulcanizihgapparatus wherein the apparatus engages only one side of a tire casing.to An addltional object of the invention is to provide a tirevulcanizing apparatus including an inner and an outer member both havingsimilarly shaped opposed walls adapted to engage a segmental portion ofa tire casing and wherein one of 1a theportions includes an air bag andthe other a heating element. 1

Another object of the invention is to provide a novel apparatus forvulcanizing a patch on the outside oil a tire casing. as Another objectof the invention is to provide a novel apparatus for vulcanizing a.patch on the interior of an automobile tire casing.

[in additional object of the invention is to provide a novel mold memberfor use in vulcanimng 25 a patch on an automobile tire casing.

Other objects and the advantages of my inven-.

tion will be apparent from the following description taken in connectionwith theaccompanying drawings. wherein: to Fig. 1 is a side elevationshowing my apparatus as engaged on a portion of an automobile tirecasing;

- Fig. 2 is an end view of the apparatus with a tire casing thereonshown in cross section.

35 I Fig. 3 is a fragmentary'sectional view taken on line 3-3 Fig. 1;Fig. 4 is a front view, partly broken away, showing the outer member; a

Fig.5 is a front view partly broken away show- 40 ing the inner moldmember; Fig. 6 is a sectional detail; Fig. '7 is a wiring diagram;

ficatlon of my invention;

Fig. 8 is a view similar'to Fig12 showing a modi- 45 Fig. 9 is a frontviewpartly broken'away showing the outer member of the modification, and

Fig. 10 is a front view partly broken away showing the inner member ormy modification.

Referring to the drawings by reference char- 60 acters I have shown myinvention as embodied in a patch vulcanizing apparatus which isindicated generally at l0. As shown. in Figs. 1 to 7 my invention isembodied in an apparatus which is adapted to vulcanize a patch such asindicated at '56 it upon the interior of a tire casing such as isindicated at l2. As shown my apparatus includes an inner mold member l 3and an outer mold member l4 both of which may be made of suitablematerial such as an aluminum casting.

The inner member l3 includes an outwardly 5 directed curved segmentalwall l5 which is sub-v stantially the shape of that of the tire to whichit is to be applied. This member l3 includes a. recess iii in its innerwall in which a heating element H such as an electrical element H is dis10 posed. This element is adapted to be operated by means of currentsupplied through leads it which extend to a plug socket member IS in aboss on one of the ends of the inner member E3. The inner memberincludes a longitudinally extending recess 2! in which a thermo-switchZia, is arranged and which as shown in Figs. 3 and 7 is in circuit withthe element I'l.

The inner member it includes a flange 22 which is in alignment with aflange 23 on the inner wall 20 Moi the outer member I 4. The flanges 22and 23 engage theedge of the head of the tire and prevent relativemovement of the parts at this location. The flange 22 includes, aprojecting portion 22c. which extends'over thefiange 23 as 25 shown inFig. 3. The outer member includes an outer wall 25, end walls 26 and abottom wall 21. The outer member is provided with an aperture 28 throughwhich a bicycle type valve stem 29 of a pneumatic air bag 36 extends.The bag 30 may 30 be inflated through the stem 29. 1 On the inner face24 of the member M I provide a resilient, rubber pad at having a metalframe 31a molded therein adjacent the edges thereof. The frame Ma isprovided with a plurality of countersunk apertures 3th and the pad 3| isprovided with apertures 3|c aligning with the apertures 3th. The pad 31is secured to the member M by screws 3! d which are positioned in theaper tures 3 lb or the frame 3Ia (see Fig. 6)

The member l3 includes a cover 32 which has a boss 33 thereon and thecover is held in place by screws 3i. A clamping block 35 is held on thecover 32 by screws 35 The clamping block includes a projecting post 36which passes through a collar 31 mounted on a clamping plate 38 whichengages a boss 39 on the member 14. The collar 37 is engaged by aremovable sleeve 40 which has an integral. nut 4| thereon which isthreaded on the end 42 of the member36. The nut it is preterablyprovided with a serrated edge 43 so that it may be readily turned.

In operation the tire casing is arranged as shown in Figs. 2 and 3 witha. patch I l of raw rubber arranged in place against the inner wall of uclamping member is secured in place.

pressure will be applied to the inner wall of the outer mold member.

casing thus urging the patch against the heated Current is then suppliedto the heating element and iscontrolled by the thermo-switch 2ia, untilthe desired cure is eifected.

In Figs. 8, 9 and 10 I have shown a modification of my invention whereinsimilar parts are indicated by similarly primed reference characters;According to this modification I employ an outer mold member H which issolid and which includes an arcuate face 50 which is adapted to engagethe outerwall of a tire casing l2. This outer mold member is providedwith a heating element 41 which is similar to the heating elementpreviously described-and the outer member is provided with a boss 20"from which leads l8 extend so that current may be supplied to theheating element. The outer member includes a recess 2|.in which athermo-switch lib is arranged.

The construction is such that the supply'of current to the heatingelement I1 is controlled by the thermo-switch 2111 so that when thetemperature rises to a certain degree the supply of current will be cutoil. In the modification the inner mold member i3 is provided with amold cavity 5| in which an air bag 30 is arranged.

This air bag is adapted to be inflated by means of a stemmed valvemember 29'. g

The inner and outer mold members are provided with bosses 33' and 39'respectively which are adapted to be engaged by a. clamping member whichincludes a block 35", a rod 36' and a control nut 4| similar to .thatpreviously described.

Having thus described my invention I claim:

1.' In a patch vulcanizing apparatus, a mold member comprising an innermember and an outer member, each of said members being of segmentalshape and including a portion of a contour to engage the inner wall of atire casing, one of said members having a recess therein, a heatingelement disposed in said recess, said one member having a boss thereon,an outlet coupling in said boss, leads extending from said coupling tosaid heating element, the other member comprising a hollow shell, saidother member having a flange and said inner member having a flange, saidflanges being adapted to engage a bead on a tire, the flange of one ofsaid members including a part extending over the other flange, saidother member including a cavity, an air bag in said cavity, said onemember having a closure for said recess, a clamping block on saidclosure, saidblock having a rod projecting therefrom, a collar slidableonsaid rod, said collar having a clamping member thereon engaging saidouter member and a nut on said rod engaging said collar.

2. In a patch vulcanlzing apparatus, a mold.

member comprising an inner member and an member comprising a hollowshell having end walls which conform to the outer surface of a tirecasing, said outer member including a cavity, an air bag in said cavity,said inner member having a closure extending over said recess,

a clamping block on said closure, said block having a rod projectingtherefrom, a collar slidable on said rod, said collar having a clampingmember thereon engaging said outer member and a nut on said rod engagingsaid collar.

3. In a patch vulcanizing apparatus, a mold member comprising an innermember and an outer member, said inner member being of segber comprisinga hollow shell having end walls which conform to the outer surface of atire casing, said outer member having a flange and said inner memberhaving a flange, said flanges being adapted to engage ahead on a tire,said inner member having its flange extending over the flange on theouter member, said outer member including a' cavity, an air bag in saidcavity, said inner member having a closure extending .over said recess,a clamping block on said closure, said block having a rod projectingtherefrom, a collar slidable on said rod, said collar having a clampingmember thereon engaging said outer member and a nut on said rod vengaging said collar.

4. In a patch vulcanizing apparatus, a mold member comprising an innermember and an outer member, said inner member being segmental andincluding an inner portion of a contour to engage the inner wall of atire casing, said inner member having a recess therein and having agroove communicating with the recess; a heating element disposed in saidrecess, a thermo-swltch in said recess, said inner member having anoutlet coupling therein, leads extending from said coupling to saidheating element, said outer member comprising a hollow shell havingsegmental end walls which canform to the outer surface of a tire casing,said outer member including a cavity, an air bag in said cavity, meansextending through the wall of said outer member whereby the air bag maybe inflated, said inner member having a closure extending over saidrecess, said closure having a boss thereon. a clamping block engagingsaid boss, means passing through said clamping block and said bossto'hold the parts assembled, said clamping block including an endportion engaging the arcuate inner wall of said inner member, said blockhaving a rod projecting therefrom, a

collar slidable on said rod, said collar having a clamping memberthereon, said outer member a sleeve on said rod, the end of said rodbeing threaded and a nut integral with said sleeve and engaging saidthreaded end of the rod.

5. In a patch vulcanizing apparatus, a mold a member comprising an innermember and an outer member, said inner member being segmental andincluding an inner portion of a contour to engage the inner wall of atire casing,

said inner member having a recess therein andhaving a groovecommunicating with said recess,

a heating element disposed in said recess, a theme-switch in saidgroovasaid inner member having a boss thereon. nfi boss, leads extendingfrom said coupling to said heating element through said switch. saidouter member comprising a hollow shell havins senmental and walls whichconform to the outer surface or a tire casing, said outer member havingan arcuate inner flange and said inner memher having an areuate outerflanse, said flanges adapted to engage a bead on a tire, said innermember having a supplemental flange extending over the flange on theouter member,

said outer member including a central cavity, an air bag in said cavity,means extending through the wall of said outer member whereby the airbag may be inflated, said inner member having a closure extending oversaid recess, said closure having a bossmthereon, a clamping blockengaging said boss, means passing through said clampins block and saidboss to hold the parts assembled, said clamping block including an endportion engaging the arcuate inner wall 0! said inner member, said blockhaving a rod projectins therefrom, a collar slidable on said rod, saidcollar having a clamping member thereon, said .hg outer member having aboss engaging said elamnina'member, a sleeve on said red. the endarsavoa outlet coupling in said leads extending from said coupling tosaid heating element, said outer member comprising a hollow shell havingend walls which coniorm to the outer surface of a tire casing, saidouter member having a flange :and said inner member lmvli'is a flange,said flanges being adapted to engage a bead on a. tire, said outermember including a cavity, an air bag in said cavity, said inner memberhaving a clamping block thereon, said block having a rod thereon, aclamping plate on said rod and engaging said outer member and means onsaid rod engaging said clamping plate.-

mom nfm'rn.

